Back to results
US 4,320,162 AGranted
Multi-ply fibrous sheet structure and its manufacture
AssigneeAmerican Can Company
InventorGalyn A. Schulz
Life of this patent
Estimating the term…
Abstract
In the manufacture of a multi-ply fibrous sheet structure, each of a pair of plies of fibrous web material is provided with a pattern of relatively deep, primary, spot embossments each adherent to the opposite ply and surrounded by a pattern of relatively shallow, secondary, non-adherent spot embossments.
Claims18
Multi-ply fibrous sheet structure, comprising:
- a pair of fibrous webs forming the plies with inner surfaces facing each other, each web having a first pattern of embossments of a first uniform depth comprising land and recess areas on said inner surfaces of said web, and a second pattern of embossments surrounding said first pattern, being of a second uniform depth less than the first, comprising land and recess areas on said inner surfaces of said webs;
- adhesive means joining distal portions of said land areas of said first pattern on one of said webs to the facing, other one of said webs;
- and distal portions of said land areas of said second pattern of embossments that surround said land areas of said second pattern of embossments on each of said webs being non-joined to the facing web.
A method for fabricating a multi-ply fibrous sheet structure, comprising:
- embossing each of a pair of fibrous webs with a first pattern of embossments of a first uniform depth comprising land and recess areas on a surface of each said web;
- embossing each of said pair of webs with a second pattern of embossments surrounding said first pattern, being of a second uniform depth less than the first, and comprising land and recess areas on said surface of each said web;
- disposing said webs with said surfaces acing each other;
- and adhesively joining only distal portions of said land areas of said first pattern of embossments on one of said webs to the other of said webs to form said sheet structure.
1 more element
Multi-ply fibrous sheet structure, comprising:
- a pair of fibrous webs forming the plies with inner surfaces facing each other, each web having a first pattern of embossments of a first uniform depth comprising land and recess areas on said inner surfaces of said web, and a second pattern of embossments surrounding said first pattern, being of a second uniform depth less than the first, and comprising land and recess areas on said inner surfaces of said webs;
- adhesive means joining distal portions of said land areas of said first pattern on one of said webs to the distal portions of said land areas of said pattern on the facing, other one of said webs;
- and distal portions of said land areas of said second pattern of embossments on each of said webs that surround said land areas of said first pattern of embossments being non-joined to the facing web.
A method for fabricating a multi-ply fibrous sheet structure, comprising:
- embossing each of a pair of fibrous webs with a first pattern of embossments of a first uniform depth comprising land and recess areas on a surface of each said web;
- embossing each of said pair of webs with a second pattern of embossments surrounding said first pattern, being of a second uniform depth less than the first, and comprising land and recess areas on said surface of each said web;
- disposing said webs with said surfaces facing each other so that land areas of said first pattern of embossments confront one another and land areas of said second pattern of embossments are meshed with one another;
- and adhesively joining only distal portions of said land areas of said first pattern of embossments on one of said webs to the distal portions of the corresponding land areas on the other of said webs to form said sheet structure.
1 more element
Dependencies are inferred from the claim text.